Clicking Add/Remove Program icon in Control Panel does not start the Program

I have been using Add/Remove icon in Control Panel to remove programs. Although the Win2k Pro is running fine ,the icon of Add/Remove Program is not opening the next window to remove the programs.
Can anyone help me?
MZR Siddiquee

Thanks.
I shall try it.
I have noted a unique thing.
When I click the Add/Remove Program icon, a process mshta.exe strats as indicated in the task manager. If i click the icon ten times ten processes of mshta.exe starts and also I can kill them.
What is this?